Cake pan



May 13, 1930. V M. LEUCHT CAKE PAN Original Filed Dec. 13 1924 2Sheets-Sheet 1 ffeZZaz Leas/at v I M. LEUCHT May 13, 1930.

CAKE PAN Original Filed Dec. 13, 1924 2.Sheets-Sheet 2 Patented May 13,1930 UNITED STATES PATENT OFFICE MELLA IEUCHT, OF TERREiHAUT-E, INDIANA,ASSIGNOR T EDWARD KATZINGER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATIONOF ILLINOIS CAKE ran Application filed December 13, 1924, Serial No.755,615. Renewed October 23, 1929. 7

My invention relates to cake pans, and has particular reference to acake pan having one or more openings in its sidewall to permit theinsertion of a knife or the like forloosening the cake from the bottomof the pan after baking. Such opening or openings are adapted to becoveredby slidable plates which have guided support on the pan wherebythey may be raised or lowered to open or close these openings. r I r Thefundamental object of the invention is to improve upon the particularconstruction of these lateral openings and their relationship to thebottom and side walls and the slidable cover plates.

One of the specific objects of theinven-- tion is to provide an improveddesign of raised bottom wall; and to provide au'niqu'eshaping or foldingof the metal'at the bottom edges of these openings to the end of ('1)obtaining an opening which extendsdown to or below the bottom wall ofthe cake pan so that the knife can be inserted flatwise across thebottom of the pan in loosening the cake, and (2) obtaining a closerfitting joint'between the bottom edge of the slidable plate and thebottom of the opening.

Other objects will be apparent from the following description of apreferred embodi- 3o ment of my invention. In the drawings illustratingthis embodiment:

Figure 1 is an elevational view of the cake pan in upright position; 1

Figure 2 is a similar view showing the cake pan inverted in'the processof coolin'gand loosening the cake; V t

Figure 3 is a transverse sectional View through the pan, taken on aplane passing through the two lateral openings ing the formation of thebottom of the opening,and' I Figure 5 is a fragmentary transversesection taken on the plane of the line 5-5 of Figure 1.

The pan is preferably, although not necessarily, constructed incylindrical form, and is made of tin or any other desired sheet metal.It comprises 2. cy indrical side wall 7 and a circular bottom wall 8.Rising from the eeri Figure 4 is an enlarged detail section showter ofthe bottom wall 8 is a tube 9, the lower end of which has upper andlower flange portions 11 and 12' which are crimped or beaded over on theupper and lower sides of the bottom wall 8. This central tube isadvantageous for conducting heat to the center of the cake in baking,and by extending the up- 'per end thereof considerably above the topedge of the pan I make additional-use of this tube as a support for thepan when the latter is inverted in the act of removing the cake, asshown in Fig. 2. In order that successive pans, when stacked forshipment, will nest properly, it is desirable'to taper the central tubeeither at theupper end or throughout its entire length.

l The upper edge of the side wall 7 is headed,

as indicated at 14:, preferably by curling the metal around a wire 15."In joining the lower edge of this, side wall 7 to the bottom wall 8,-the latter is first formed with a downwardly turnedflange 16 to the endof raising the entire bottom wall from side to side of the cake I pan.The portions of the lower edge of the side wall 7'lying between thelateral openings 17 are provided with narrow, outwardly extendingflanges 18, as shown in Fig. 5.7' A horizontal flange 19 is turnedoutwardly from the lower edge of the downwardly extending flange16 ofthe bottom wall to receive the outwardly extending flange 18 of the sidewall. The protruding metal of the bottom wall is then curved around andover the top of the flange 18 in the form of an upper locking flange 21which rigidly joins the side and bottom walls ofthe pan. ripheral edgeof the metal may be curled in} ,wardly or downwardly, as indicated at22, .t

The extreme pe obviate any sharp edges. 7 r

. Referring now to the'openings 17, it"will be observed that theseconsist of horizontal slots which are preferably out at diametricallyopposite points in the side wall of the pan. The

'lower edge of theside wall is cut away entirely in forming theseopenings, and the'peripheral edge of the bottom wall has the slightlydifferent shaping in the locality of the slots shown in Figs.z3 and 4.The outer edge of the horizontal bottom flange 19 is folded over uponitself directly in these openings to form a front retaining wall 23 ineach opening for engaging the outer side of the slidable cover plate 24.The space between this outer retaining wall 23 and the inner retainingwall defined by the flange 16 forms a recess 25 for receiving theloweredge of the plate 24. Attention is directed to the fact thatthisrecess 25 is entirely below the top surface of the bottom wall and thatwhen the plate 24 is moved down to a completely closed position, itslower edge will lie below the top surface of the bottom wall 8. 7

It should also be noted that the upper edge 1 of the inner retainingwall 16 is at the upper surface of the pan bottom whereas the upper edgeof the outer retaining wall 23 is 'atan appreciably lower level so thatif the lower edge of the slide24'will not fitrinto the recess 25,between the retaining walls by movement all the way to the upper surfaceof the flange 17 or nearly so, a partial recess willbe formed at by thelower edge of the slide 24 strik- 7 ing against the upper edge of theretaining 'wall 23 to limit the lower edge of the slide 24 at a positionbelow the upper surfaceof the pan bottom; that is to say, if the slidecannot fully enter the recess 25 the upper edge of. the wall 23. willserve as an abutment for the lower edge of the slide and co-operate withsuch lower edge and part of the retainw ing wall 16 to close the loweredge of the slot I'Tbythe lower edge of the slide partially entering therecess at the point designated 25 in Fig. 4 of the drawings. I V t Theplates24 are guided along their VGI" tical edgesby guides 27, whichconsist of one-piece .stampings punched from sheet metal. These guidescomprise lateral attaching flanges 28 which are secured to the side wall7 by rivets 29. The guide flanges 31 V are raised to protrude from theside wall 7 and form guideways therebetween, The upper edge ofeach plate24 is flanged outwardly, as indicated at32, and a continuationof themetal is then punched backwardly under .thisfflange or lip, as shownat'33,v The lat-,

1 .eraledges of eachplate which protrude above the guide27 are foldedover diagonally, in orderto obviate sharp edges on these closing plates.The upper flange or lip 32 forms a handlefor'ra ising and lowering theplate ,and, by engaging the upper bead114, forms a stop for limiting theupwardmovement of theplate. V V v fThe guides 27 effectively preventleakage along the lateral edges of the closure plates 24. The joint atthe bottom-edge of the opening is effectively closed by contact betweenthe? bottom edge of the plate 24 and the bottom'of the recess 25, bycontact between either the outer or inner sides, or both, of the plate:24, and the side walls 23 and 16 of the rece"ss'.. It will be noted thatthe lower edge of the. opening 17 extends down completely to the topsurface of the bottomv wall 8, so

that a knifecan be inserted flatwise across I thatthe lower legs of thelateral vertical guides 27 for the vertical lateral edges of the slideor closure or shutter 24 extend all the way down to the retaining wall23. The width of the shutter orclosure 24, is greater than the length ofthe slot117 as shown in Figs. land 2. The elongated cross-plates actasguides to direct the lower edge of the slide or shutter 24 verticallydownward into the recess 25 while holding the slide or shut ter closeagainst the outer side wall of thepan andover the ends of the slot 17.Such elongated holding means is particularly useful when the loweredgeflof the slide can only partially enter the recess 25 because theninstead of relying on the recess 25 to hold the 7 lower portion oftheslide inposition to form an effective closure aga1nst leakage, theelongated cross-plates'of the guide 27 may be relied on to retaintheslide in snug fitting relation with the ends of the opening 17, the

lower edge of suchopening being closed the recess 25. All portions'ofthe plate 24 are therefore held at all times in close fittingrelationwith the outer wall of the pan, which is particularly desirablewhen the opening 17 is closed. The-lateral vertical guides for thevertical edges'of the slide facilitate directing theslide verticallydownward and holding the lower edge of the slide in parallelism with thebottom of the pan but such vertical guides alone may not be sufficientto hold the slide in close engagement with the outer wall of the panatintermediate portions. I would prefer to retain the elongatedcross-plates and provide a'narrower slide without vertical guides forthe edges of the slide than omit thecross-guide for holding" thebody'portion of the slide close against the pan wall. It will also beseen that'the slide or shutter 24 is not detachable.

To prepare the pan for filling, the two plates 24 are thrust downwardlyto project their lower edges in firm engagement with the recesses 25.During baking, these plates remain closed. When the cake'is to becooled, the pan is removed from the oven, inverted, and made to stand-onthe central tube 9, as

shown in Fig. 2. In removing the cake from the pan, it may be maintainedin its inverted position, and the plates 24-24 pressed downwardly toexpose the openings 1717 inthe the slide over the opening 17. However,by

.the use of the cross-piece or web riveted seside wall 7, allowing airto enter between the bottom of the cake and the pan bottom and I therebyremoving atmospheric pressure as a factor in holding the cake in theinverted pan. A thin knife blade may be inserted through the openings 1717 to facilitate the separation of the bottom of the cake from the panbottom 8. a

YVhen the pan is inverted the downward movement of the shutters 24 islimited by the head 15 acting as an abutment. As above explained thecover, shutteror slide24 is confined at all times in close fittingrelation with the outer wall of the pan'and can not be removed from thepan. The guides on opposite sides of the opening 17 mayin some instancesbe sufficientalone to retain the plate over the opening and aline itwith the retainer for the lower edge of the slide but it can readily beseen that to secure greater assur ance that the slideor shutter will beretained over the opening 17 flush against the upright wall and tosecure better alinement of the. intermediate portions of the lower edgeof the slide with the retainer below it, the elongated cross-pieces orwebs should be used.'

The upright guides confine the plate against lateral displacement of theslide, the upper rim 14 and the lower wall 23 act as stops or abutmentsagainst endwise vertical detach- Inent of the slide from the pan, andthe double cross-piece or web confines the slide to close contact overits whole inner area with the outer wall of the pan and therefore it isevident that the slide will be guided accurately to'its closed positionwhere its lower edge 7 will be embraced by the retaining walls 16 and23. The cross-piece or web therefore cooperates with the retainer forthe lower edge of the slide in securing a dough-tight fit of curely tothe pan, as shown, in rigid relation therewith, the slide will bedirected to and held against the wall 16 to efficiently cover theopening 17 even though the lowerwall '23 may be so distorted as not topermit full descent of the slide into the recess 25.

I claim: 1; A cake pan comprising aside wall, a

bottom wall, said side wall having an opening therein, a slidable platefor covering said opening, said bottom wall comprising a downwardlyextending flange, a horizontally extending flange projecting from saiddownwardly extending flange, and a turned over flange at the outer edgeof said horizontal I flange to form a channel-shaped recess at thebottom'of said opening, the upper edge of said turned over flange beingbelow the upper surfaceof the bottom of the pan.

2. A cake pan comprisingoa side wall, a

bottom wall, said side wall having an opening therein, a slidable platefor covering said opening, said bottom wall comprisinga downing therein,a slidable plate'for covering said opening,and a one-piece guide forguiding both lateral edges of said plate.

A. A cake pan'comprising aside wall, a bottom wall, said side wallhaving anopening therein, a slidable plate for covering said opening,and a one-pieceguide for said plate comprising two lateral guide flangesspaced 7 from said side Wall and two'attaching flanges secured to saidside wall.

5. A bake pan comprising a bottom, an upright wall extending upwardlyfrom the bottom and having a narrow opening thereon in position for theinsertion of a knife along the upper surface of such bottom beneathbaked material to loosen the same, a shutter slidable vertically tocover and uncover said opening, means secured to said upright wallbetween the top and bottom of the pan and 7 extending across saidshutter to guide; the

shutter to open and closed positions andto confine it closely to saidupright wall, and abutments for limiting the upright movements of saidshutter.

6. In a bake pan, the combination with a bottom, of an upright wallsecured to said bottom, with alrim at the top thereof and a narrowelongated opening at the bottom thereof with a laterally projectingflange at the lower side of said opening, a sliding shutter for saidopening limited in its movements 'by the pan rim and saidflange, andmeans secured to said upright wall intermediate the top and bottomthereof in position to engage said shutter transversely to hold the samein close sliding contact along its inner surface with the body portionof the outer wall of said pan while co-acting with said rim andflange-to prevent detachment of the shutter from the pan. j

7. A bake pan comprising a cylindrical all y projecting wired rim'at itsupper edge,

a bottom of sheet metal secured to said up right wall to leave a flangeat the periphery of said bottom for supporting the pan with said bottomraised from the surface on which it rests, said wall having an openingthe lower edge of which is in position to permit a knife to be insertedthrough said opening upright wall of sheet metal having'a later- I inthe plane of the'upper surface of said bottom above a laterallyprojecting portion 'ofsaid flange adjacent said opening, a sheet metalshutter slidable vertically below said dough-tight fit over saidopening.

in 8. In a bake'pan, the combination with an upright wall having anelongated opening therein, of a bottom connected to said wall, avertically movable shutter for" said "opening, a retainer for the loweredge of said shutter below the upper surface'of said bottom, and meanssecured to the pan wall to engage said shutter intermediate its ends andextend across the'same below the upper edge of said upright wall andco-act with said retainer to hold the shutte-r'closed.

9. In a bake pan the combinationwith a bottom, of an upright wall withanelongated opening, having its lower edge at-the said bottom to enable aknife to'be inserted into the pan along "the upper surface zof'the saidbottom, a laterally extending flange below said openingwith the upperedge of said flange below the upper surface of said bottom, a shutterfor said opening, and means secured to said pan in position to engagesaid shutter transversely to hold it against the said wall for movementto closed position "against said lowered flange;

10. Apanhaving a side wall with an opening therein, a sliding 1 coverforthe opening, and means for confining the said cover to the pan andguiding said cover to open and closed positions, said means com prisingvertical guides for, the lateral edges of the cover and across-connecting web plate to engageintermediate portions of the coverand hold the, same against the saidwall when closing said'opening.

11. A pan having a side wall with an opening therein, a sliding shutterfor said open ing, and guiding means for the shutter com rising a webplate extending across the shutter to hold the same against the panwall.

12. A bake pan having aside wall with an opening therein, a slidingshutter for said opening, means secured to the pan in position to engagethe shutter; transversely and hold the same against the pan wall, and aretainer for receiving and embracing-the lower edge of said. shutter toco-act with said engaging means to hold the shutter with a 13. A bakepan having a side wall with an opening therein,,a sliding shutter forsaidopening, and a one piece stamping punched from sheet metal'with anofiset coninecting web-adapted to be secured to said Well to confinesaid shutter'for sliding movement behind said web within the limits ofthe tonand bottom of the an; 7 14. A pannaving a side wall withanopening therein, a sliding cover for said opening,

and; means for confining saidscover to said pan for limited movementrelatively thereto comprising a one piece stamping having securing meansand an ofiset connecting. web

for embracing transversely the said cover 1 to confine the sameasaforesaid.v

15. A path having a sidewall with an open} ing therein, a sliding coverfor said opening,

and a one-piece stamping punched from sheet 7 a metal withflangesriveted to the pan wall and with an oiiset connecting web protrudingfrom the side wall to receive and embrace the cover to confine the sameto the pan and hold of sheet metal foran-elongated openingin the sidewall'with'the bottom of said opening at the upper surface of the panbottom, a -re tainer below the plane of said upper surface and belowsaid opening inposition to receive and embrace the lower edge of saidshutter, a sheet metal plate riveted to the pan wall and having uprightspaced apart guides for the lateral edges of said shutter andtwoofisetconnecting webs one adj acentthe top of said opening and the othermidway-between the top and bottom of the pan, said webs engaging thebody portion of said'shutter to hold the same against the pan wall, andan upper laterally projecting rim for the pan in position to act as anupper abutment for said slide to prevent detachment thereof from thepan. 7 17.

A bake pan comprising a side'wall'ha'va guide plate secured to said panwall and ing an opening therein, a bottom connected to said wall, ashutter for said opening, and

comprising an offset connecting web above and adjacent to the saidopening to engage saidwall when the shutter is in closed posinr 18. Apan having a side wall with an'opening therein, a sliding cover for theopening and means for securingthe cover to the pan, comprising guidewaysstamped from asingle piece of metal and secured to the side wall alongopposite sides of the opening therein, an integral connecting webbetween the guideways overlying the cover, stops posi tioned above andbelow the opening in the side wall for limiting the sliding movement ofthe cover, the stop below the opening in the side wall comprisingaflange adapted to embrace. the lower edge of the cover and the stopabove said opening comprising a bead on the upper edge of the side walland a projection on the side of the cover adapted to abut against saidbead.

. .110 said shutter and hold the same against the 19. A pan having aside wall with an opening therein, a sliding cover for the opening, andmeans for securing the cover to the pan, comprising guideways secured tothe.

side wall along opposite sides of the opening therein, stops positionedabove and below the opening in the side wall for limiting the slidingmovement of the cover, the stop below the opening in the side wallcomprising a flange adapted to embrace the lower edge of the cover andthe stop above said opening comprising a bead on the upper edge oftheside wall and a projection on the side of the cover 7 adapted to abutagainst said head, the guideways being constructed from one piecestampings punched from sheet metal having attaching flanges, and anofiset connecting" web, said web protruding from the side wall of thepan with the cover confined therebetween.

20. A pan having a side wall with an 'opening therein, a sliding coverfor said opening and means for securing the cover to the pan,

comprising a one piece stamping punched from sheet metal to provideattachingflanges and an offset connecting web, said web protruding fromthe side wall of the pan with the cover confined therebetween.

V 21. A pan having a side wall with an opening therein, a sliding coverfor said opening and means for securing the cover to the pan, comprisinga one piece stamping punched from sheet metal to provide attachingflanges and an ofi'set connecting web, said 6 Web protruding from theside wall ofthe pan withthe cover confined therebetween and 1 means onthe pan for limiting the sliding movement of the cover.

In witness whereof, I hereunto subscribe my name this 10th day ofDecember, 1924. MELLA LEUCHT,

